Recorded 30 January 2026. Omer Angel of the University of British Columbia presents "Phase transitions in the frog model" at IPAM's New Interactions Between Probability and Geometry Workshop. Abstract: The frog model is an interacting particle system modeling spread of an infection in a moving population, among other things. It can also be viewed as a model of dependent, directed percolation. We show that the model exhibits a phase transition on several classes of transitive graphs, including polynomial growth and non-amenable graphs. We further show that the phase transition is sharp. Joint work with Jonathan Hermon, Daniel de la Riva Massaad, and Yuliang Shi. Learn more online at: https://www.ipam.ucla.edu/programs/workshops/new-interactions-between-probability-and-geometry/?tab=overview